It depends entirely on the time in question.
germany's term limits
Germany is a federal parliamentary republic, so it does not have a traditional ruler. The head of state is the President of Germany, and the head of government is the Chancellor.
Paul von Hindenburg was elected president in 1925.
He was elected for chancellor and when the president died Hitler siezed the opertunity and merged Chancellor and president into one.
The head of government is the chancellor(Bundeskanzler or Bundeskanzlerin for a female chancellor), roughly equivalent to a prime minister. Germany has a separate head of state, who is the president(Bundespräsident).
Hitler was the ruler of Germany Hope this answers your question :)
Germany has a president.
Ruler? The president is Ivo Josipovic(ć).
Adolf Hitler was the ruler of Germany from 1933 until the beginning fo WW2.
President Paul Von Hindenburg. He died in office in 1934. He was succeeded by Hitler who came in as Führer & Chancellor.
Ever heard of "Hitler''??
1933